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Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exist
From: |
Gleb Natapov |
Subject: |
Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists |
Date: |
Tue, 21 Feb 2012 13:00:57 +0200 |
On Tue, Feb 21, 2012 at 11:59:23AM +0100, Peter Lieven wrote:
> On 21.02.2012 11:56, Gleb Natapov wrote:
> >On Tue, Feb 21, 2012 at 11:50:47AM +0100, Peter Lieven wrote:
> >>>I hope it will make Windows use TSC instead, but you can't be sure
> >>>about anything with Windows :(
> >>Whatever it does now it eates more CPU has almost equal
> >>number of exits and throughput is about the same (15MB/s).
> >>If pmtimer is at 0xb008 it still reads it like hell.
> >>
> >>I checked with bcedit /v that useplatformclock is set to "No".
> >Yeah, today I noticed that it is likely virtio drivers that hammer
> >on PM timer (at least rip of the instruction that access it is
> >very close to rip of the instruction that access virtio pio).
> >Vadim, Windows driver developer, is CCed.
> Ok, I will switch to IDE and e1000 to confirm this? Or does it not
> make sense?
>
It make perfect sense! Please try it.
--
Gleb.
- [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/20
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Gleb Natapov, 2012/02/20
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Gleb Natapov, 2012/02/20
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/20
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/20
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Gleb Natapov, 2012/02/20
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Gleb Natapov, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists,
Gleb Natapov <=
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Gleb Natapov, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Vadim Rozenfeld, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Vadim Rozenfeld, 2012/02/21
- Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/21
Re: [Qemu-devel] win7 bad i/o performance, high insn_emulation and exists, Peter Lieven, 2012/02/20